Timer1 and interrupt every second ?

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Any ideas where I can find weather information on XML and then parse it with AVR ?

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XML is a large, complex and totally separate topic from AVR8 timers.

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I Googled 'weather xml' and got a few hits. You might want to look at json encoding as it is a tad simpler. Even so, as Mike suggests, it is not a job well suited for an AVR with limited ram. Its one line of code in php if you're running Linux or Windows.
Put arduino into your google search and you get some more targetted hits.
http://arduino.stackexchange.com/questions/1092/parse-json-with-arduino-...

Remember - Google first, ask questions later

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Quote:

it is not a job well suited for an AVR with limited ram.

Easily done on something like a Raspberry Pi of course - about the same cost as an AVR board.

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Quote:
Easily done on something like a Raspberry Pi of course - about the same cost as an AVR board.

Does it have enough port for multiplexing 7 segment ?

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GPIO details here:

http://elinux.org/RPi_Low-level_peripherals#General_Purpose_Input.2FOutp...

(almost every question you ask here can be answered by Google you know?).

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Quote:
almost every question you ask here can be answered by Google you know?

Considering the difficulty to even read things, the prospect of typing something into the Google search box must be quite daunting..

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